Gramophone, phonograph, and like horn.



J. GREEN. GRAMOPHONE, PHONOGRAPH, AND LIKE HOR Patented Dec. 17,1912.

APPLICATION FILED FEB.13,I911.

&

'ofhorns for gramophones,

. by the passage therethrough of JOSHUA GREEN, or nonnon'nnemnnGRAMOIfHONE, PHONOGI RIAPH, AND LIKE HORN" Specification of LettersPatent.

Patented Dec. 17,1912.

Application filed February 13, 1911. Serial ll'o. 608,255

To all whom it concern; a

Be it known that I, JOSHUA GREEN, a su b ject of the King of GreatBritain, residing at 27 Pyrland road,- Canonbu-ry, London, England, haveinvented new and useful Imrovemepts in Gramophone, Phonograph, and LikeHorns, ofwhich the following is a specification- My invention relatesto. the manufacture the like. Such horns are. inpractice usually made ofmetal, such as tin, or of wood, and in the latter case are built up ofsections or strips, the edges of the adjacent stripsbeing connectedtogether so as to form-a complete horn. This construction, however, iscostly. Now, my invention has for its object to provide means wherebysuch wooden horns, which, for various reasons are preferred to the tinhorns, can be manufactured at a considerably less cost than has hithertobeen possible. To this end, according to, my invention I make a hornfrom a single blank ot'wood which shaped to the usual conformation andis connected together at the two adjoining edges.

In carrying out my invention I advantageously proceed as follows, thatis to say, I

takea blank of ply-wood, and 1 subject thesame to a dry heat, the heatbeing continued until the wood becomes pliable and can be worked on amold of the shape of the horn to be produced. In practice I may ofahollow metal mold whichis internally heated in any suitable way,say,for example, the gases of combustion from afire or furnace, or of steam.The ply-wood from which the horn is to be made is applied to the saidheated mold and is gradually caused to assume the shape of the finishedhorn. To connect the,

' butt st rip,

' be opened out or abutting edges of the bent blank forming the horn, Imay, for example, make use of a or I may halve the edges and connectthem together or I may connect them in any other well known way.

In the case of horns in which the bell mouth or flared end is of markeddimensions some ditficultymay be experienced in the molding and I may,therefore, make the extremity of the strip which to form the saidbell-mouth or flared end witha series of slits which permit flaredto-the extent.- desired. The wedge or other shaped spaces-whichareformed by the slits when the extremity is phonographs andmake usethesaid extremity to' thus opened out may be filled up in any convementway. For example, separate pieces of wood maybe filled in the saidspaces or a strip or strips. of wood may. be applied circumferentiallyaround the inner orthe outersurface of thehorn at the slit extremity;

In practice the insertions or portions .of

Wood applied to the flared end or bell-'m'outh of the horn may be ofdifferentcolors thus giving rise to artisticeflects of a kind which maybe varied as desired. v f

To enable the invention to be fully understood, I will describe it byreference to the accompanying drawing, in which Figure 1 is a side viewof a horn molded from a single blank of wood'according to my invention-Fig. 2 is a front view there of. Fig,- 3 is a transverse section of thejoint between the edges of the wooden blank forming the horn and drawnto {a larger;- scale. Fig. 4 is a view similar to Fig. 3, butillustrating a modifiedLform of joint, and.

5 and 6 are views similar to Figs. "1 and 2 respectively of the modifiedconstruction of horn.

Referring first to the construction of. horn illustrated in Figs. 1 to3, a represents the. single blank of ply-wood which wood is molded tothe 'shape indicated by being subjected to a dry. heat which iscontinued as above described until the wood becomes sufficiently pliableto permit of its being molded to the desired shape. paratus may be madeuse of for molding the wood such as a hollow metal mold inteinallyheated by steam or other gas or vapor. It is'necessary that theply-wood,.'to-stand this treatment should be specially pliable.

I have found that three-ply wood made of alder, the cute layers beingimillimeter "in thickness and t-he-inner layer millimeter issufficiently 1 that in the ply-wood .employed'by me, as in allply-woo'd, the grainof each layer'is disposed across Thetwo meeting orabutting edges. 6, c, of the molded blank a forming the horn are Anysuitable. ap'-':

iable. It is to be, i 1nder stood-'- the grain of adjacent layers.

connected'toget-her by meansof the joint strip (Z which is appliedexternally to the horn as illustrated. Or the joint maybe made asindicated in Fig. l that is to, say, by halving the meeting edges 12 and0. Figs. and 6' illustrate a horn in which the flaring end of the moldedstrip a is formed with slits or cut away" portions e,; the spaces thusformedwhen the flared end is molded being filled up by the separatepieces of Wood f, f which are applied around the outer or innerperiphery of the horns; in the construction illustrated the said piecesf are applied externally.

As above stated the pieces f may be composed of Wood of a differentcolor from that forming the body a of the horn, thus giving rise tovaried artistic efiects.

Claims. I

1. As a new article of manufacture, an amplifying born for gramophonesand the like, consisting of a single integral piece of previouslyprepared ply-Wood, and having its meeting edges united to form a singleseam extending longitudinally of the horn.

2. As a new article of manufacture, an amplifying horn for gramophonesand the like, consisting of a single integral piece of previouslyprepared ply-Wood, and having its'meeting edges united to form a singleseam extending longitudinally of the horn,

the marginal portions at the larger end ofthe horn being split and theintegral pieces so formed being spread apart, and separate piecessecured to said separated integral pieces to close the apertures formedbetween them and complete the bell of the horn.

JOSHUA GREEN. Witnesses:

J OHN E. BOUSFIELD, A. ALBUTT.

